Democritus was the first to state that matter is made of tiny particles that? a-cannot be divided b- can be divided c-are small and round
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He is also attributed with the creation of the name "Atomos" to indicate not-divisible.
Answer:
cant be dived or destroyed
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any change in the circuit caused by the ammeter, its resistance should ideally be zero.
The voltmeter measures the voltage between two points. It must be connected
between those points, and in parallel with everything between them in the circuit.
In order to avoid any change in the circuit caused by the voltmeter, its resistance
should ideally be infinite.
Final answer:
An ideal ammeter has zero resistance to avoid altering the current it measures, while an ideal voltmeter has infinite resistance to prevent drawing current from the device it's measuring the voltage of.
Explanation:
The resistance of an ideal ammeter is zero ohms. This ensures that it doesn't interfere with the current it is measuring. An ammeter is connected in series with the circuit, and if the resistance were greater than zero, it would decrease the amount of current circulating in the circuit.
On the other hand, an ideal voltmeter has infinite resistance. This happens because a voltmeter is connected in parallel with a device to measure its voltage, and to avoid drawing current from the device, an ideal voltmeter should have infinite resistance.
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Answer:
Explanation:
If P₁(p) be the partial pressure of gas in first bulb then
P₁(p) (1 +1.5) = P₁V₁ = 1 X 0.75
P₁(p) = (1 / 2.5) x .75 = 0.3 atm
Similarly partial pressure of gas in second bulb
= ( 1.5 / 2.5) x 1.2 = .72 atm
Total pressure= .3 + .72 = 1.02 atms.
If n₁ and n₂ be their moles in the respective bulbs
P₁V₁ = n₁ R t
P₂ V₂ = n₂ R t
mole fraction of argon =
=
= 15 / 51
Mole fraction of helium = 1 - 15 / 51 = 36 / 51
Answer:
The total pressure of the mixture is 1.02 atm.
Partial pressure of the argon :
Partial pressure of the helium :
Explanation:
Volume of argon in the bulb = = 1.00 L
Pressure of argon in the bulb = = 0.75 atm
Temperature of the both the gases = T
Moles of argon gases =
..[1]
Volume of helium in the bulb = = 1.50 L
Pressure of helium in the bulb = = 1.20 atm
Moles of helium gases =
..[2]
[1] ÷ [2]
After opening the stopcock, the gases are mixed.
The mole fraction of argon =
The mole fraction of helium=
Volume of the mixture ,V= 1.00 L + 1.50 L =2.50 L
Total pressure in the mixture = P
Temperature is same = T
Total moles of gases in the mixtures = n
The total pressure of the mixture is 1.02 atm.
Partial pressure of the argon after mixing :
Partial pressure of the helium after mixing :
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Answer:
(A) Atmosphere.
Explanation:
The atmosphere is a thing, not a unit of measurement. (this is the simplified version)
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B: a change in size
C: a change in color
D: the formation of a liquid
E: the formation of a precipitate
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The indicators that a chemical reaction is occurring include:
A: the formation of bubbles
C: a change in color
D: the formation of a liquid
E: the formation of a precipitate are all correct
Signs that show that chemical reaction is occurring
Formation of Bubbles (Gas Evolution): The production of gas bubbles can signify a chemical reaction. This often happens when reactants combine to release a gaseous product, such as in the reaction of an acid with a carbonate, producing carbon dioxide.
Change in Color: A noticeable change in color can indicate a chemical reaction. It suggests that the arrangement of atoms in the molecules has changed, leading to the absorption or emission of specific wavelengths of light.
Formation of a Precipitate: A precipitate is an insoluble solid formed when two solutions are mixed. It suggests that a chemical reaction has occurred because the reactants have combined to create an insoluble product.
The indicators that a chemical reaction is occurring include all the following
the formation of bubbles, a change in color, the formation of a liquid and the formation of a precipitate
These are common signs of a chemical reaction. A change in size can also be an indicator in some cases, especially if it accompanies the formation of a gas (bubbles).
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~The chemical produces bubbles
~ The Chemical emits an odor
~ The liquid forms a solid(Precipitate)
~ There is a change of color
~ And last but not least a change in temperature!
Hope this can help! Good luck!